How To Troubleshoot
WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
- Bring in the car
Next
- Phenomenon check
Next
- Communication function inspection of the CAN communication system
- Check that there are no abnormal condition in CAN communication system. (Refer to
HOW TO TROUBLESHOOT
)RESULT
Result Go to If CAN communication system is normal [No DTC (CAN communication error, ECM communication error, or lost communication) is output] A If CAN communication system is not normal [DTC (CAN communication error, ECM communication error, or lost communication) is output] B B: Repair the fault according to the troubleshooting procedure for CAN system.
A: Go to Next Step
- Check that there are no abnormal condition in CAN communication system. (Refer to
HOW TO TROUBLESHOOT
)
- Communication function check of the large-scale multiplex communication system for vehicle body [LIN]
- Use SSM3 to check the communication functions of the large-scale multiplex communication system for vehicle body [LIN] to confirm the communication system has no fault. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES
)NOTE: For details of DTC output, refer to the List of DTC. (Refer to LIST OF DIAGNOSTIC CODES )RESULT
Result Go to If the communication system is defective [DTC (LIN communication error, ECM communication error, or lost communication) is output] A If DTC other than for communication system is output [No DTC (LIN communication error, ECM communication error, or lost communication) is output] B B: Go to the corresponding section for DTC output
A: Go to Next Step
- Use SSM3 to check the communication functions of the large-scale multiplex communication system for vehicle body [LIN] to confirm the communication system has no fault. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES
)
- DTC check
- Use SSM3 to check DTC and record the code output if any. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )
- Clear diagnostic code. (Refer to CHECKING/CLEARING DIAGNOSTIC CODES )
- Simulate the conditions indicated by DTC to check whether the same DTC recur.RESULT
Result Go to If no DTC is output (phenomenon can be confirmed and reproducible) A If no DTC is output (phenomenon can not be confirmed and not reproducible) B If DTC is output C B: Go to "How to simulate trouble phenomenon". (Refer to PROCEDURES FOR MALFUNCTION PHENOMENON SIMULATION )
C: Go to Troubleshooting flowchart of each DTC. (Refer to LIST OF DIAGNOSTIC CODES )
A: Go to Next Step
- Troubleshoot the malfunction according to the method below
- ECM terminal arrangement (Refer to ECM TERMINAL ARRANGEMENT
)
Next
- ECM terminal arrangement (Refer to ECM TERMINAL ARRANGEMENT
)
- Adjustment, repair, or replacement
Next: Complete